Method and system for generating indoor geomagnetic navigation reference map

Abstract

The invention relates to the field of indoor geomagnetic navigation and discloses a method and a system for generating an indoor geomagnetic navigation reference map. The method comprises the following steps: building an indoor plane graph, building a coordinate system based on pixel space of the indoor plane graph, drawing a data collection road section based on the built indoor plane graph, extracting an initial node and a terminal node according to the data collection road section, building a topological relationship between the nodes and the road section, determining the data collection road section, collecting three-component data of a geomagnetic field in a coordinate system of a smart phone at a uniform speed along the data collection road section through the smart phone, recording coordinates of the geomagnetic field, obtaining instantaneous posture parameters of the smart phone relative to an initial state according to real-time acquired posture information of the smart phone, performing coordinate conversion on the collected three-component data of the geomagnetic field according to the posture parameters, obtaining a three-component numerical value of the geomagnetic field in an absolute coordinate system, and storing the numerical value in a database to generate the indoor geomagnetic navigation reference map. The method and the system improve the update efficiency of the indoor geomagnetic navigation reference map and reduce the cost.

Description

technical field [0001] The invention relates to the field of indoor geomagnetic navigation, in particular to a method for generating an indoor geomagnetic navigation reference map. Background technique [0002] With the development of society, large shopping plazas, large office buildings, libraries, underground parking garages, large supermarket conference centers, hospitals, etc. have gradually become the main places for people to work, live, and entertain. It is often necessary to determine the current location information and reach the destination route information, which requires an indoor navigation means to achieve indoor positioning and navigation. [0003] At present, GPS positioning and navigation, which is widely used, is difficult to realize the communication between mobile terminals and satellites indoors due to the occlusion of buildings, and it is impossible to complete indoor precise positioning and navigation. In recent years, with the rapid development and...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a method for generating an indoor geomagnetic navigation reference map, which solves the technical problems of complex implementation of the measurement means in the prior art and difficulty in later update and maintenance of the geomagnetic reference map

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